/*
 * Copyright (c) 2012-2017 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package org.eclipse.che.api.git;

import static org.eclipse.che.dto.server.DtoFactory.newDto;

import javax.inject.Singleton;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.ExceptionMapper;
import javax.ws.rs.ext.Provider;
import org.eclipse.che.api.git.exception.*;
import org.eclipse.che.api.git.shared.ConflictExceptionError;
import org.eclipse.che.dto.server.DtoFactory;

/**
 * Exception mapper for all GIT exceptions
 *
 * @author Yossi Balan (yossi.balan@sap.com)
 */
@Provider
@Singleton
public class GitExceptionMapper implements ExceptionMapper<GitException> {

  /** check the exception type and build Response with the status body and the type of the error */
  @Override
  public Response toResponse(GitException exception) {
    if (exception instanceof GitRefNotFoundException)
      return Response.status(Response.Status.NOT_FOUND)
          .entity(DtoFactory.getInstance().toJson(exception.getServiceError()))
          .type(MediaType.APPLICATION_JSON)
          .build();
    else if (exception instanceof GitInvalidRefNameException)
      return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
          .entity(DtoFactory.getInstance().toJson(exception.getServiceError()))
          .type(MediaType.APPLICATION_JSON)
          .build();
    else if (exception instanceof GitRefAlreadyExistsException)
      return Response.status(Response.Status.INTERNAL_SERVER_ERROR)
          .entity(DtoFactory.getInstance().toJson(exception.getServiceError()))
          .type(MediaType.APPLICATION_JSON)
          .build();
    else if (exception instanceof GitConflictException) {
      ConflictExceptionError conflictExceptionError =
          newDto(ConflictExceptionError.class)
              .withMessage(exception.getServiceError().getMessage())
              .withConflictingPaths(((GitConflictException) exception).getConflictPaths());
      return Response.status(Response.Status.CONFLICT)
          .entity(DtoFactory.getInstance().toJson(conflictExceptionError))
          .type(MediaType.APPLICATION_JSON)
          .build();
    }
    return Response.serverError()
        .entity(DtoFactory.getInstance().toJson(exception.getServiceError()))
        .type(MediaType.APPLICATION_JSON)
        .build();
  }
}
